Blackberry torch 9810 keesp rebotting

The red led comes up the screen is all black i try to charge it keeps going red for a few seconds then it turns off. i took the battery of and connected the charger it only shows that there is the battery icon. i hook it up to the computer without the battery it works but if place it does it. i try to update it and downgrade it with blackberry desktop and it does not work. try using research and motion loader and it did not work. i try using bbsak but it does not find the device.
what else can i do i cant connect the battery or it will reboot only showing the red led

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